Add a README.md file to src/app/tests/suites/ (#8085)
Add a README.md file to src/app/tests/suites/ (#8085)

* Add a README.md file to src/app/tests/suites/

* Update src/app/tests/suites/README.md

Co-authored-by: Michael Spang <5e8e222dc164976a78189e17b872c7cda97e0830@gmail.com>

Co-authored-by: Justin Wood <0bbbba7770b1bbf11a4ba4287fb5f0d87d17df25@apple.com>
Co-authored-by: Michael Spang <5e8e222dc164976a78189e17b872c7cda97e0830@gmail.com>
nestlabs/connectedhomeip,nestlabs/connectedhomeip,project-chip/connectedhomeip,project-chip/connectedhomeip,nestlabs/connectedhomeip,nestlabs/connectedhomeip,nestlabs/connectedhomeip,project-chip/connectedhomeip,nestlabs/connectedhomeip,project-chip/connectedhomeip,nestlabs/connectedhomeip,project-chip/connectedhomeip,project-chip/connectedhomeip